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Table 3 Parameters of mechanical dyssynchrony at baseline and after 6 months of CRT

From: Echocardiographic markers of dyssynchrony as predictors of super-response to cardiac resynchronisation therapy – a pilot study

Parameter I group (n = 20) II group (n = 39) Р
Systolic dyssynchrony index, (%) At baseline 9.5±3.4 7.5±4.4 0.05
After 6 months 2.8±1.2a 3.1±1.2a 0.278
Mean changes −6.4[−8.7;-4.3] −2.8[− 8.2;-0.36] 0.044
Left ventricular pre-ejection period, (ms) At baseline 160.5±31.2 131.5±29.5 0.002
After 6 months 127.7±22.8a 118.3±21.2a 0.292
Mean changes −35.5[−53.7;-11.2] −18.5[− 35.0;1.7] 0.043
Right ventricular pre-ejection period, (ms) At baseline 102.1±21.4 95.4±18.6 0.249
After 6 months 106.4±16.7 103.3±26.2 0.716
Mean changes 9.5[−17.0;30.7] 14.5[−13.5;33.5] 0.512
Interventricular mechanical delay, (ms) At baseline 57.5±28.3 39.7±24.2 0.024
After 6 months 19.9±15.9a 25.4±11.7 0.357
Mean changes −47.0[−55.0;-13.0] −11.0[−36.5;3.0] 0.054
Interventricular delay by TDI, (ms) At baseline 110.2±66.1 71.6±57.9 0.038
After 6 months 58.4±56.7a 50.6±48.3a 0.653
Mean changes −31.0[−120;12.5] −20.5[−66.2;8.2] 0.165
Intraventricular delay by TDI, (ms) At baseline 88.4±45.3 67.7±42.8 0.098
After 6 months 54.7±44.9a 36.9±25.5 0.568
Mean changes −57.5[−80.2;-28.0] −12.0[− 40.0;15.0] 0.005
  1. TDI – tissue Doppler imaging
  2. a – difference between baseline and postimplant level (р < 0.05)